EP3752812A1 - Dispositif de test d'impact et procédé de fonctionnement d'un dispositif de test d'impact - Google Patents

Dispositif de test d'impact et procédé de fonctionnement d'un dispositif de test d'impact

Info

Publication number
EP3752812A1
EP3752812A1 EP18716929.7A EP18716929A EP3752812A1 EP 3752812 A1 EP3752812 A1 EP 3752812A1 EP 18716929 A EP18716929 A EP 18716929A EP 3752812 A1 EP3752812 A1 EP 3752812A1
Authority
EP
European Patent Office
Prior art keywords
testing device
impact
impact testing
vibration sensor
head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP18716929.7A
Other languages
German (de)
English (en)
Inventor
Xin Xin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Industry Software NV
Original Assignee
Siemens Industry Software NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Industry Software NV filed Critical Siemens Industry Software NV
Publication of EP3752812A1 publication Critical patent/EP3752812A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M7/00—Vibration-testing of structures; Shock-testing of structures
    • G01M7/08—Shock-testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/001—Impulsive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003—Generation of the force
    • G01N2203/0032—Generation of the force using mechanical means
    • G01N2203/0039—Hammer or pendulum

Definitions

  • the present invention is concerned with the area of impact testing. More particularly, the invention concerns impact testing performed on mechanical structures and parts thereof - commonly termed as unit under test or UUT hereinafter - for testing the dynamic behavior. Still more particularly, the invention concerns impact testing on a vehicle body structure or parts thereof when e.g. applying kinematics & compliances scenarios (K&C scenarios) and/or an experimental modal analy sis (EMA) in a test environment and for obtaining a frequency response, wherein the resulting frequency response is ana lyzed with a view to identifying potential weaknesses and/or for improving the rigidity of the relevant UUT.
  • K&C scenarios kinematics & compliances scenarios
  • EMA experimental modal analy sis
  • a modal hammer is basically a regular hammer, comprising a hammerhead (head) and a handle to which the head is attached.
  • a modal hammer distinguishes over a regular hammer in that a modal hammer comprises a force sensor.
  • a hammer is an ordinary tool, using a modal hammer for impact testing has proven to be a valid method.
  • a modal hammer has certain advantages, it also involves various shortcomings.
  • the advantages are fairly ob vious: A modal hammer is cheap, at least considerably cheaper than a shaker; a modal hammer is easy to use and using a mod al hammer does not require particular skills; a modal hammer is lightweight and thus easy to be moved around when employed from different positions.
  • the impacts can be applied at a wide frequency range, theoretically from a little over 0 Hz, which is not achievable by a shaker.
  • a modal hammer is em ployed as an impact testing device when less critical meas urements are due or as a backup equipment.
  • a modal hammer is a less preferable impact testing device.
  • the impact testing device disclosed herein is basically an improved version of a modal hammer as described above and one aspect of the present invention involves that the improved hammer comprises at least one sensor for determining data and/or a value for at least one further parameter other than the parameter "force" when performing an impact test. More particularly, the present invention provides an impact testing device comprising a head (hammerhead) and a handle to which the head is affixed, wherein the head carries at least one sensor, e.g. a vibration sensor, for providing data with respect to at least one further parameter when applying an impact while performing an impact test.
  • a head hammerhead
  • a handle to which the head is affixed
  • the head carries at least one sensor, e.g. a vibration sensor, for providing data with respect to at least one further parameter when applying an impact while performing an impact test.
  • Another aspect of the present invention involves a method for operating an impact testing device as above or as described in more detail hereinafter.
  • the present invention more particularly provides a method for operating an impact test ing device as described above and hereinafter, wherein data obtained when applying an impact to a UUT is employed to au tomatically classify / assess the instant impact applied with the impact testing device as "good” (acceptable) or "bad” (inadequate; to be rejected) and/or wherein the said obtained data is optionally recorded and being made available for com parisons .
  • FIG 1 shows an impact testing device
  • FIG 2 and FIG 3 show an impact in the time domain and in the frequency domain
  • FIG 4 shows various vibration signals resulting from an impact applied to a UUT
  • FIG 5 shows an impact testing system
  • FIG 1 shows an impact testing device 10 as proposed herein.
  • the impact testing device 10 is an improved form of a modal hammer known in the art.
  • the subject impact testing device 10 features a head 12 and a handle 14 to which the head 12 is affixed. Owing to the form and the function of head 12 and handle 14 the impact testing device 10 in the as yet de scribed form is basically a conventional hammer.
  • FIG 2 and FIG 3 show the results of an impact 16 applied by the impact testing device 10 of FIG 1 on the relevant unit under test (UUT) , the unit itself not being shown, in the time domain (FIG 2) and in the frequency domain (FIG 3) .
  • the graph in FIG 3 shows an example frequency response resulting from applying an impact on the UUT.
  • the impact testing device 10 is a "smart hammer" on account of at least one vibration sensor 20 being attached to the head 12 or the handle 14.
  • the vibration sensor 20 (or one sensor 20 of multiple sensors 20 attached to the impact test ing device 10) is an accelerometer attached to the head 12 of the impact testing device 10, for example to the back of the said head 12. Attaching the vibration sensor 20 to the back of the head 12 conveniently allows for employing a hole, e.g. a threaded hole, in the back of the head 12 when attaching the vibration sensor 20 to the head 12. The said hole is originally provided for applying additional mass to the head 12 and consequently the vibration sensor 20 can be attached to the head 12 without having to machine or even to modify the head 12.
  • a hole e.g. a threaded hole
  • a vibration sensor 20 in the form of an accelerometer allows direct sensing of the vibration of the impact testing device 10 resulting from applying an impact to the relevant UUT . It has been discovered that a misalignment in the angle under which the impact is applied is linked to unusual vibration of the impact testing device 10. Also the force exercised when applying the impact is proportional to a resulting vibration of the impact testing device 10. A force too strong results in a stronger than expected vibration. Similarly, a force too weak results in a lower than expected vibration. Consequently it was discovered that assessing an impact as properly ap plied and the resulting data as suitable for further pro cessing can be assessed with a view to a bandwidth in the am plitude of the vibration measured by the accelerometer.
  • FIG 4 shows three exemplary vibration signals 30, 32, 34.
  • Each vibration signal 30, 32, 34 is an example for a vibration signal 30, 32, 34 obtained by means of the vibration sensor 20 following an impact applied to a UUT with an impact testing device 10.
  • the impact testing de vice 10 is a "smart hammer" as shown in FIG 1 and the vibra tion sensor 20 is preferably an accelerometer.
  • the frequency f is shown over the abscissa and the amplitude A over the ordinate.
  • a first vibration signal 32 is discernible fairly similar to a reference vibration signal 30. Consequently the impact 16, which causes the first vibration signal 32, can automatically be evaluated as an ac ceptable impact.
  • an impact 16 resulting in a vibra tion signal 34 further apart from the reference vibration signal 30 or lacking sufficient similarity with the reference vibration signal 30 can also automatically be evaluated as inadequate and the associated data, e.g. a frequency response obtained from the UUT, can automatically be discarded.
  • an impact 16 is inadequate and automatically assessed as such whenever the resulting vibration signal 32, 34 is lacking a predefined level of similarity with the ref erence vibration signal 30. This is exemplarily shown in FIG 4 where the second vibration signal 34 is clearly dissim ilar to the reference vibration signal 30.
  • the second vibration signal 34 is dis similar to the reference vibration signal 30 on account of a much higher amplitude over the frequency spectrum.
  • an automatic assessment of the quality of an impact 16 can be carried out by comparing a predefined average value of the resulting vibration signal 32, 34 with a predefined or variable reference value and whenever an absolute value of a difference of the aforesaid average value and reference value exceeds a predefined threshold, e.g. 5%, the impact 16 and data resulting therefrom is automatically discarded.
  • the said average value is an average value representing unusual vibration levels in a certain fre quency range in a direction other than the impact direction (i.e. a lateral direction) .
  • the automatic assessment of the quality of an impact 16 can be carried out by comparing e.g. the arithmetic mean of the am plitudes of the resulting vibration signal 32, 34, with the arithmetic mean of the amplitudes of the reference vibration signal 30 and whenever an absolute value of a difference of the aforesaid arithmetic mean exceeds a predefined threshold, e.g. 5%, the impact 16 and data resulting therefrom is auto matically discarded.
  • a predefined threshold e.g. 5%
  • FIG 5 shows an impact testing system 40.
  • the impact testing system 40 comprises at least one impact testing device 10 as proposed in this disclosure.
  • the impact testing system 40 further comprises a processing unit 42 communicatively linked to the at least one impact testing device 10.
  • the processing unit 42 is provided for assessing an impact 16 as acceptable or inadequate and is thus a means for assessing an impact 16 as acceptable or inadequate.
  • Instant data 44 ob tained from the at least one vibration sensor 20 i.e. vibra tion data 44; for example vibration data 44 in the form of vibration signal (s) 32, 34
  • accelerometer data is transferred via the communication link to the processing unit 42.
  • the processing unit 42 is adapted to compare (as de scribed above) the said data 44 obtained from the at least one vibration sensor 20 with reference data 46 (e.g. the ref erence vibration signal 30), preferably predefined or tunable reference data 46, when assessing an impact 16 as acceptable or inadequate.
  • the result of the said comparison is an auto matic assessment 48 pertaining to the impact 16 for which the instant data 44 was obtained, generated by means of a comput er program 50 run by the processing unit 42.
  • the assessment 48 is an automatically processable classification of the rel evant impact 16 as acceptable or inadequate.
  • data resulting from the impact 16 is either further processed, e.g. in kinematics & compliances plausibleri os, or discarded.
  • the said further processing of data stem ming from an impact 16 assessed as acceptable can be per formed by the processing unit 42 or a further computerized system communicatively linked to the processing unit 42. Any such further computerized system receives the instant data and the assessment 48 pertaining thereto from the processing unit 42.
  • the impact testing device 10 or multiple impact testing devices 10 and the processing unit 42 constitute the impact testing system 40.
  • this disclosure proposes an impact testing device 10 comprising a head 12 and a handle 14 to which the head 12 is affixed and further comprising at least one vibration sensor 20.
  • This disclosure furthermore proposes a method of using the said impact testing device 10 for automatically assessing impacts applied with the impact testing device 10 to the relevant UUT .

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

L'invention concerne un dispositif de test d'impact (10) comprenant une tête (12) et un manche (14) auquel est fixée la tête (12) et comprenant en outre au moins un capteur de vibration (20), et concerne en outre un procédé d'utilisation dudit dispositif de test d'impact (10) pour évaluer automatiquement des impacts appliqués au moyen du dispositif de test d'impact (10) sur un objet.
EP18716929.7A 2018-03-26 2018-03-26 Dispositif de test d'impact et procédé de fonctionnement d'un dispositif de test d'impact Ceased EP3752812A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/057667 WO2019185114A1 (fr) 2018-03-26 2018-03-26 Dispositif de test d'impact et procédé de fonctionnement d'un dispositif de test d'impact

Publications (1)

Publication Number Publication Date
EP3752812A1 true EP3752812A1 (fr) 2020-12-23

Family

ID=61952641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18716929.7A Ceased EP3752812A1 (fr) 2018-03-26 2018-03-26 Dispositif de test d'impact et procédé de fonctionnement d'un dispositif de test d'impact

Country Status (4)

Country Link
US (1) US20210018397A1 (fr)
EP (1) EP3752812A1 (fr)
CN (1) CN111919101A (fr)
WO (1) WO2019185114A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3071719B1 (fr) * 2017-09-29 2022-06-03 Centre Nat Rech Scient Dispositif d'insertion d'un implant chirurgical

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3620638A1 (de) * 1986-06-20 1987-12-23 Timofej Ivanovic Selomencev Verfahren zur bestimmung des technischen zustands eines luftreifens
EP0351430B1 (fr) * 1986-08-28 1994-05-04 Mitsui Engineering and Shipbuilding Co, Ltd. Appareil d'inspection de structures du type a impact
US6748791B1 (en) * 1996-10-18 2004-06-15 The Boeing Company Damage detection device and method
US20160030815A1 (en) * 2011-09-19 2016-02-04 James Kenyon Sprague Method and device for detecting under-inflated game balls during a football game
DE102013215932B3 (de) * 2013-08-12 2015-02-19 Rosenberger Hochfrequenztechnik Gmbh & Co. Kg Messvorrichtung mit Fernsteuerung
KR101543146B1 (ko) * 2014-01-29 2015-08-10 경희대학교 산학협력단 진동 장치의 상태 판단 방법
CN103913286B (zh) * 2014-04-14 2016-12-07 南京林业大学 一种用于对物体进行模态测试的装置

Also Published As

Publication number Publication date
CN111919101A (zh) 2020-11-10
US20210018397A1 (en) 2021-01-21
WO2019185114A1 (fr) 2019-10-03

Similar Documents

Publication Publication Date Title
US10101252B2 (en) Method of measuring damping using optical imaging technique
US11813895B2 (en) Tire wear measuring apparatus using irregularity of tire acceleration signal and tire wear measuring method using same
JP6688962B2 (ja) 判定装置、判定方法、および判定プログラム
US20120130682A1 (en) Real-time detection system and the method thereof
JP6777224B2 (ja) 損傷検出装置、方法およびプログラム
WO2019185114A1 (fr) Dispositif de test d'impact et procédé de fonctionnement d'un dispositif de test d'impact
JP6825714B2 (ja) 振動判定装置、振動判定方法及びプログラム
CN110488188B (zh) 基于动态阈值的机组三维健康量化评价方法
KR101543146B1 (ko) 진동 장치의 상태 판단 방법
CN109738358B (zh) 控制光学物质检测设备的方法、装置及光学物质检测设备
US6997035B2 (en) Method and device for evaluating restitution characteristics of a golf club head
CN110874083A (zh) 加工环境测定装置
KR101946631B1 (ko) 압축센싱 기반 구조물 상태진단 시스템 및 그 방법
JP4654377B2 (ja) ひび割れ卵検出装置
US20190011402A1 (en) Inspection device, inspection method, and non-transitory recoding medium storing inspection program
CN108593769B (zh) 利用多通道控制弹性波的归一化信号激振无损检测方法
US11549961B2 (en) Impact detection system for vehicle and impact detection system method therefor
JPH04233427A (ja) 釣合い試験の過程で共振の増加を自動検出するための方法および装置
CN112665885B (zh) 吊装设备的平稳性评测方法、装置、吊装设备及存储介质
JP2018200217A (ja) 打音検査装置及び打音検査方法
US11624687B2 (en) Apparatus and method for detecting microcrack using orthogonality analysis of mode shape vector and principal plane in resonance point
JP7272143B2 (ja) 検査機管理システム及び検査機管理方法
CN117419847A (zh) 用于螺栓紧固工具的电磁超声预紧力测试系统
JP3857193B2 (ja) シリコンウェハのクラック検出方法
JPH0587784B2 (fr)

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20200916

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20220509

REG Reference to a national code

Ref country code: DE

Ref legal event code: R003

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 20221015